Took my car in to get the wires concealed. They where not suppose to touch any settings on anything.
When I got the car back about 200m down the road got an electronic smell.
It just so happened that they fiddled with the amp and blew the sub-woofer which was 2 days old.
When I confronted them about it they just said that they take no responsibility for it.
If I can give you advice take all things not needed for what you want done out of the vehicle as they will not take any responsibility for anything that is wrong with equipment after getting it back.
Or even better advice don't use them at all!